Portion of a shoe outsole



FIG. 1 is a bottom front perspective view of a portion of a shoe outsole showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a bottom rear perspective view thereof; and,

FIG. 4 is a bottom plan view thereof showing my new design.

The uneven broken lines within the shaded area and the uneven broken line showing the shoe upper illustrate the portions of the design that form no part of the claim. 

The ornamental design for a portion of a shoe outsole, as shown and described. 